Joe Biden had revealed that he was arrested on his attempt to see Nelson Mandela in 1970 but later denied the incident stating he was only detained.
However, Biden and a deputy campaign manager later recanted the story on February 28, 2020, stating that he was not arrested but was only held up at the airport for refusing to use a whites-only entrance after arriving in the country.
Since there is no other evidence or statements given by any other officials on the incident, it cannot be accurately asserted whether he was arrested or detained.
Correction: The previous version of FactCheck showed the claim to be Unverifiable. Based on further evaluation, the judgment has been updated to Partly True.